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linux/drivers/crypto/caam/pdb.h
Gustavo A. R. Silva 5224f79096 treewide: Replace zero-length arrays with flexible-array members 
There is a regular need in the kernel to provide a way to declare
having a dynamically sized set of trailing elements in a structure.
Kernel code should always use “flexible array members”[1] for these
cases. The older style of one-element or zero-length arrays should
no longer be used[2].

This code was transformed with the help of Coccinelle:
(next-20220214$ spatch --jobs $(getconf _NPROCESSORS_ONLN) --sp-file script.cocci --include-headers --dir . > output.patch)

@@
identifier S, member, array;
type T1, T2;
@@

struct S {
  ...
  T1 member;
  T2 array[
- 0
  ];
};

UAPI and wireless changes were intentionally excluded from this patch
and will be sent out separately.

[1] https://en.wikipedia.org/wiki/Flexible_array_member
[2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays

Link: https://github.com/KSPP/linux/issues/78
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
2022-02-17 07:00:39 -06:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* CAAM Protocol Data Block (PDB) definition header file
*
* Copyright 2008-2016 Freescale Semiconductor, Inc.
*
*/
#ifndef CAAM_PDB_H
#define CAAM_PDB_H
#include "compat.h"
/*
* PDB- IPSec ESP Header Modification Options
*/
#define PDBHMO_ESP_DECAP_SHIFT 28
#define PDBHMO_ESP_ENCAP_SHIFT 28
/*
* Encap and Decap - Decrement TTL (Hop Limit) - Based on the value of the
* Options Byte IP version (IPvsn) field:
* if IPv4, decrement the inner IP header TTL field (byte 8);
* if IPv6 decrement the inner IP header Hop Limit field (byte 7).
*/
#define PDBHMO_ESP_DECAP_DEC_TTL (0x02 << PDBHMO_ESP_DECAP_SHIFT)
#define PDBHMO_ESP_ENCAP_DEC_TTL (0x02 << PDBHMO_ESP_ENCAP_SHIFT)
/*
* Decap - DiffServ Copy - Copy the IPv4 TOS or IPv6 Traffic Class byte
* from the outer IP header to the inner IP header.
*/
#define PDBHMO_ESP_DIFFSERV (0x01 << PDBHMO_ESP_DECAP_SHIFT)
/*
* Encap- Copy DF bit -if an IPv4 tunnel mode outer IP header is coming from
* the PDB, copy the DF bit from the inner IP header to the outer IP header.
*/
#define PDBHMO_ESP_DFBIT (0x04 << PDBHMO_ESP_ENCAP_SHIFT)
#define PDBNH_ESP_ENCAP_SHIFT 16
#define PDBNH_ESP_ENCAP_MASK (0xff << PDBNH_ESP_ENCAP_SHIFT)
#define PDBHDRLEN_ESP_DECAP_SHIFT 16
#define PDBHDRLEN_MASK (0x0fff << PDBHDRLEN_ESP_DECAP_SHIFT)
#define PDB_NH_OFFSET_SHIFT 8
#define PDB_NH_OFFSET_MASK (0xff << PDB_NH_OFFSET_SHIFT)
/*
* PDB - IPSec ESP Encap/Decap Options
*/
#define PDBOPTS_ESP_ARSNONE 0x00 /* no antireplay window */
#define PDBOPTS_ESP_ARS32 0x40 /* 32-entry antireplay window */
#define PDBOPTS_ESP_ARS128 0x80 /* 128-entry antireplay window */
#define PDBOPTS_ESP_ARS64 0xc0 /* 64-entry antireplay window */
#define PDBOPTS_ESP_ARS_MASK 0xc0 /* antireplay window mask */
#define PDBOPTS_ESP_IVSRC 0x20 /* IV comes from internal random gen */
#define PDBOPTS_ESP_ESN 0x10 /* extended sequence included */
#define PDBOPTS_ESP_OUTFMT 0x08 /* output only decapsulation (decap) */
#define PDBOPTS_ESP_IPHDRSRC 0x08 /* IP header comes from PDB (encap) */
#define PDBOPTS_ESP_INCIPHDR 0x04 /* Prepend IP header to output frame */
#define PDBOPTS_ESP_IPVSN 0x02 /* process IPv6 header */
#define PDBOPTS_ESP_AOFL 0x04 /* adjust out frame len (decap, SEC>=5.3)*/
#define PDBOPTS_ESP_TUNNEL 0x01 /* tunnel mode next-header byte */
#define PDBOPTS_ESP_IPV6 0x02 /* ip header version is V6 */
#define PDBOPTS_ESP_DIFFSERV 0x40 /* copy TOS/TC from inner iphdr */
#define PDBOPTS_ESP_UPDATE_CSUM 0x80 /* encap-update ip header checksum */
#define PDBOPTS_ESP_VERIFY_CSUM 0x20 /* decap-validate ip header checksum */
/*
* General IPSec encap/decap PDB definitions
*/
/**
* ipsec_encap_cbc - PDB part for IPsec CBC encapsulation
* @iv: 16-byte array initialization vector
*/
struct ipsec_encap_cbc {
u8 iv[16];
};
/**
* ipsec_encap_ctr - PDB part for IPsec CTR encapsulation
* @ctr_nonce: 4-byte array nonce
* @ctr_initial: initial count constant
* @iv: initialization vector
*/
struct ipsec_encap_ctr {
u8 ctr_nonce[4];
u32 ctr_initial;
u64 iv;
};
/**
* ipsec_encap_ccm - PDB part for IPsec CCM encapsulation
* @salt: 3-byte array salt (lower 24 bits)
* @ccm_opt: CCM algorithm options - MSB-LSB description:
* b0_flags (8b) - CCM B0; use 0x5B for 8-byte ICV, 0x6B for 12-byte ICV,
* 0x7B for 16-byte ICV (cf. RFC4309, RFC3610)
* ctr_flags (8b) - counter flags; constant equal to 0x3
* ctr_initial (16b) - initial count constant
* @iv: initialization vector
*/
struct ipsec_encap_ccm {
u8 salt[4];
u32 ccm_opt;
u64 iv;
};
/**
* ipsec_encap_gcm - PDB part for IPsec GCM encapsulation
* @salt: 3-byte array salt (lower 24 bits)
* @rsvd: reserved, do not use
* @iv: initialization vector
*/
struct ipsec_encap_gcm {
u8 salt[4];
u32 rsvd1;
u64 iv;
};
/**
* ipsec_encap_pdb - PDB for IPsec encapsulation
* @options: MSB-LSB description
* hmo (header manipulation options) - 4b
* reserved - 4b
* next header - 8b
* next header offset - 8b
* option flags (depend on selected algorithm) - 8b
* @seq_num_ext_hi: (optional) IPsec Extended Sequence Number (ESN)
* @seq_num: IPsec sequence number
* @spi: IPsec SPI (Security Parameters Index)
* @ip_hdr_len: optional IP Header length (in bytes)
* reserved - 16b
* Opt. IP Hdr Len - 16b
* @ip_hdr: optional IP Header content
*/
struct ipsec_encap_pdb {
u32 options;
u32 seq_num_ext_hi;
u32 seq_num;
union {
struct ipsec_encap_cbc cbc;
struct ipsec_encap_ctr ctr;
struct ipsec_encap_ccm ccm;
struct ipsec_encap_gcm gcm;
};
u32 spi;
u32 ip_hdr_len;
u32 ip_hdr[];
};
/**
* ipsec_decap_cbc - PDB part for IPsec CBC decapsulation
* @rsvd: reserved, do not use
*/
struct ipsec_decap_cbc {
u32 rsvd[2];
};
/**
* ipsec_decap_ctr - PDB part for IPsec CTR decapsulation
* @ctr_nonce: 4-byte array nonce
* @ctr_initial: initial count constant
*/
struct ipsec_decap_ctr {
u8 ctr_nonce[4];
u32 ctr_initial;
};
/**
* ipsec_decap_ccm - PDB part for IPsec CCM decapsulation
* @salt: 3-byte salt (lower 24 bits)
* @ccm_opt: CCM algorithm options - MSB-LSB description:
* b0_flags (8b) - CCM B0; use 0x5B for 8-byte ICV, 0x6B for 12-byte ICV,
* 0x7B for 16-byte ICV (cf. RFC4309, RFC3610)
* ctr_flags (8b) - counter flags; constant equal to 0x3
* ctr_initial (16b) - initial count constant
*/
struct ipsec_decap_ccm {
u8 salt[4];
u32 ccm_opt;
};
/**
* ipsec_decap_gcm - PDB part for IPsec GCN decapsulation
* @salt: 4-byte salt
* @rsvd: reserved, do not use
*/
struct ipsec_decap_gcm {
u8 salt[4];
u32 resvd;
};
/**
* ipsec_decap_pdb - PDB for IPsec decapsulation
* @options: MSB-LSB description
* hmo (header manipulation options) - 4b
* IP header length - 12b
* next header offset - 8b
* option flags (depend on selected algorithm) - 8b
* @seq_num_ext_hi: (optional) IPsec Extended Sequence Number (ESN)
* @seq_num: IPsec sequence number
* @anti_replay: Anti-replay window; size depends on ARS (option flags)
*/
struct ipsec_decap_pdb {
u32 options;
union {
struct ipsec_decap_cbc cbc;
struct ipsec_decap_ctr ctr;
struct ipsec_decap_ccm ccm;
struct ipsec_decap_gcm gcm;
};
u32 seq_num_ext_hi;
u32 seq_num;
__be32 anti_replay[4];
};
/*
* IPSec ESP Datapath Protocol Override Register (DPOVRD)
*/
struct ipsec_deco_dpovrd {
#define IPSEC_ENCAP_DECO_DPOVRD_USE 0x80
u8 ovrd_ecn;
u8 ip_hdr_len;
u8 nh_offset;
u8 next_header; /* reserved if decap */
};
/*
* IEEE 802.11i WiFi Protocol Data Block
*/
#define WIFI_PDBOPTS_FCS 0x01
#define WIFI_PDBOPTS_AR 0x40
struct wifi_encap_pdb {
u16 mac_hdr_len;
u8 rsvd;
u8 options;
u8 iv_flags;
u8 pri;
u16 pn1;
u32 pn2;
u16 frm_ctrl_mask;
u16 seq_ctrl_mask;
u8 rsvd1[2];
u8 cnst;
u8 key_id;
u8 ctr_flags;
u8 rsvd2;
u16 ctr_init;
};
struct wifi_decap_pdb {
u16 mac_hdr_len;
u8 rsvd;
u8 options;
u8 iv_flags;
u8 pri;
u16 pn1;
u32 pn2;
u16 frm_ctrl_mask;
u16 seq_ctrl_mask;
u8 rsvd1[4];
u8 ctr_flags;
u8 rsvd2;
u16 ctr_init;
};
/*
* IEEE 802.16 WiMAX Protocol Data Block
*/
#define WIMAX_PDBOPTS_FCS 0x01
#define WIMAX_PDBOPTS_AR 0x40 /* decap only */
struct wimax_encap_pdb {
u8 rsvd[3];
u8 options;
u32 nonce;
u8 b0_flags;
u8 ctr_flags;
u16 ctr_init;
/* begin DECO writeback region */
u32 pn;
/* end DECO writeback region */
};
struct wimax_decap_pdb {
u8 rsvd[3];
u8 options;
u32 nonce;
u8 iv_flags;
u8 ctr_flags;
u16 ctr_init;
/* begin DECO writeback region */
u32 pn;
u8 rsvd1[2];
u16 antireplay_len;
u64 antireplay_scorecard;
/* end DECO writeback region */
};
/*
* IEEE 801.AE MacSEC Protocol Data Block
*/
#define MACSEC_PDBOPTS_FCS 0x01
#define MACSEC_PDBOPTS_AR 0x40 /* used in decap only */
struct macsec_encap_pdb {
u16 aad_len;
u8 rsvd;
u8 options;
u64 sci;
u16 ethertype;
u8 tci_an;
u8 rsvd1;
/* begin DECO writeback region */
u32 pn;
/* end DECO writeback region */
};
struct macsec_decap_pdb {
u16 aad_len;
u8 rsvd;
u8 options;
u64 sci;
u8 rsvd1[3];
/* begin DECO writeback region */
u8 antireplay_len;
u32 pn;
u64 antireplay_scorecard;
/* end DECO writeback region */
};
/*
* SSL/TLS/DTLS Protocol Data Blocks
*/
#define TLS_PDBOPTS_ARS32 0x40
#define TLS_PDBOPTS_ARS64 0xc0
#define TLS_PDBOPTS_OUTFMT 0x08
#define TLS_PDBOPTS_IV_WRTBK 0x02 /* 1.1/1.2/DTLS only */
#define TLS_PDBOPTS_EXP_RND_IV 0x01 /* 1.1/1.2/DTLS only */
struct tls_block_encap_pdb {
u8 type;
u8 version[2];
u8 options;
u64 seq_num;
u32 iv[4];
};
struct tls_stream_encap_pdb {
u8 type;
u8 version[2];
u8 options;
u64 seq_num;
u8 i;
u8 j;
u8 rsvd1[2];
};
struct dtls_block_encap_pdb {
u8 type;
u8 version[2];
u8 options;
u16 epoch;
u16 seq_num[3];
u32 iv[4];
};
struct tls_block_decap_pdb {
u8 rsvd[3];
u8 options;
u64 seq_num;
u32 iv[4];
};
struct tls_stream_decap_pdb {
u8 rsvd[3];
u8 options;
u64 seq_num;
u8 i;
u8 j;
u8 rsvd1[2];
};
struct dtls_block_decap_pdb {
u8 rsvd[3];
u8 options;
u16 epoch;
u16 seq_num[3];
u32 iv[4];
u64 antireplay_scorecard;
};
/*
* SRTP Protocol Data Blocks
*/
#define SRTP_PDBOPTS_MKI 0x08
#define SRTP_PDBOPTS_AR 0x40
struct srtp_encap_pdb {
u8 x_len;
u8 mki_len;
u8 n_tag;
u8 options;
u32 cnst0;
u8 rsvd[2];
u16 cnst1;
u16 salt[7];
u16 cnst2;
u32 rsvd1;
u32 roc;
u32 opt_mki;
};
struct srtp_decap_pdb {
u8 x_len;
u8 mki_len;
u8 n_tag;
u8 options;
u32 cnst0;
u8 rsvd[2];
u16 cnst1;
u16 salt[7];
u16 cnst2;
u16 rsvd1;
u16 seq_num;
u32 roc;
u64 antireplay_scorecard;
};
/*
* DSA/ECDSA Protocol Data Blocks
* Two of these exist: DSA-SIGN, and DSA-VERIFY. They are similar
* except for the treatment of "w" for verify, "s" for sign,
* and the placement of "a,b".
*/
#define DSA_PDB_SGF_SHIFT 24
#define DSA_PDB_SGF_MASK (0xff << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_Q (0x80 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_R (0x40 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_G (0x20 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_W (0x10 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_S (0x10 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_F (0x08 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_C (0x04 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_D (0x02 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_AB_SIGN (0x02 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_SGF_AB_VERIFY (0x01 << DSA_PDB_SGF_SHIFT)
#define DSA_PDB_L_SHIFT 7
#define DSA_PDB_L_MASK (0x3ff << DSA_PDB_L_SHIFT)
#define DSA_PDB_N_MASK 0x7f
struct dsa_sign_pdb {
u32 sgf_ln; /* Use DSA_PDB_ definitions per above */
u8 *q;
u8 *r;
u8 *g; /* or Gx,y */
u8 *s;
u8 *f;
u8 *c;
u8 *d;
u8 *ab; /* ECC only */
u8 *u;
};
struct dsa_verify_pdb {
u32 sgf_ln;
u8 *q;
u8 *r;
u8 *g; /* or Gx,y */
u8 *w; /* or Wx,y */
u8 *f;
u8 *c;
u8 *d;
u8 *tmp; /* temporary data block */
u8 *ab; /* only used if ECC processing */
};
/* RSA Protocol Data Block */
#define RSA_PDB_SGF_SHIFT 28
#define RSA_PDB_E_SHIFT 12
#define RSA_PDB_E_MASK (0xFFF << RSA_PDB_E_SHIFT)
#define RSA_PDB_D_SHIFT 12
#define RSA_PDB_D_MASK (0xFFF << RSA_PDB_D_SHIFT)
#define RSA_PDB_Q_SHIFT 12
#define RSA_PDB_Q_MASK (0xFFF << RSA_PDB_Q_SHIFT)
#define RSA_PDB_SGF_F (0x8 << RSA_PDB_SGF_SHIFT)
#define RSA_PDB_SGF_G (0x4 << RSA_PDB_SGF_SHIFT)
#define RSA_PRIV_PDB_SGF_F (0x4 << RSA_PDB_SGF_SHIFT)
#define RSA_PRIV_PDB_SGF_G (0x8 << RSA_PDB_SGF_SHIFT)
#define RSA_PRIV_KEY_FRM_1 0
#define RSA_PRIV_KEY_FRM_2 1
#define RSA_PRIV_KEY_FRM_3 2
/**
* RSA Encrypt Protocol Data Block
* @sgf: scatter-gather field
* @f_dma: dma address of input data
* @g_dma: dma address of encrypted output data
* @n_dma: dma address of RSA modulus
* @e_dma: dma address of RSA public exponent
* @f_len: length in octets of the input data
*/
struct rsa_pub_pdb {
u32 sgf;
dma_addr_t f_dma;
dma_addr_t g_dma;
dma_addr_t n_dma;
dma_addr_t e_dma;
u32 f_len;
};
#define SIZEOF_RSA_PUB_PDB (2 * sizeof(u32) + 4 * caam_ptr_sz)
/**
* RSA Decrypt PDB - Private Key Form #1
* @sgf: scatter-gather field
* @g_dma: dma address of encrypted input data
* @f_dma: dma address of output data
* @n_dma: dma address of RSA modulus
* @d_dma: dma address of RSA private exponent
*/
struct rsa_priv_f1_pdb {
u32 sgf;
dma_addr_t g_dma;
dma_addr_t f_dma;
dma_addr_t n_dma;
dma_addr_t d_dma;
};
#define SIZEOF_RSA_PRIV_F1_PDB (sizeof(u32) + 4 * caam_ptr_sz)
/**
* RSA Decrypt PDB - Private Key Form #2
* @sgf : scatter-gather field
* @g_dma : dma address of encrypted input data
* @f_dma : dma address of output data
* @d_dma : dma address of RSA private exponent
* @p_dma : dma address of RSA prime factor p of RSA modulus n
* @q_dma : dma address of RSA prime factor q of RSA modulus n
* @tmp1_dma: dma address of temporary buffer. CAAM uses this temporary buffer
* as internal state buffer. It is assumed to be as long as p.
* @tmp2_dma: dma address of temporary buffer. CAAM uses this temporary buffer
* as internal state buffer. It is assumed to be as long as q.
* @p_q_len : length in bytes of first two prime factors of the RSA modulus n
*/
struct rsa_priv_f2_pdb {
u32 sgf;
dma_addr_t g_dma;
dma_addr_t f_dma;
dma_addr_t d_dma;
dma_addr_t p_dma;
dma_addr_t q_dma;
dma_addr_t tmp1_dma;
dma_addr_t tmp2_dma;
u32 p_q_len;
};
#define SIZEOF_RSA_PRIV_F2_PDB (2 * sizeof(u32) + 7 * caam_ptr_sz)
/**
* RSA Decrypt PDB - Private Key Form #3
* This is the RSA Chinese Reminder Theorem (CRT) form for two prime factors of
* the RSA modulus.
* @sgf : scatter-gather field
* @g_dma : dma address of encrypted input data
* @f_dma : dma address of output data
* @c_dma : dma address of RSA CRT coefficient
* @p_dma : dma address of RSA prime factor p of RSA modulus n
* @q_dma : dma address of RSA prime factor q of RSA modulus n
* @dp_dma : dma address of RSA CRT exponent of RSA prime factor p
* @dp_dma : dma address of RSA CRT exponent of RSA prime factor q
* @tmp1_dma: dma address of temporary buffer. CAAM uses this temporary buffer
* as internal state buffer. It is assumed to be as long as p.
* @tmp2_dma: dma address of temporary buffer. CAAM uses this temporary buffer
* as internal state buffer. It is assumed to be as long as q.
* @p_q_len : length in bytes of first two prime factors of the RSA modulus n
*/
struct rsa_priv_f3_pdb {
u32 sgf;
dma_addr_t g_dma;
dma_addr_t f_dma;
dma_addr_t c_dma;
dma_addr_t p_dma;
dma_addr_t q_dma;
dma_addr_t dp_dma;
dma_addr_t dq_dma;
dma_addr_t tmp1_dma;
dma_addr_t tmp2_dma;
u32 p_q_len;
};
#define SIZEOF_RSA_PRIV_F3_PDB (2 * sizeof(u32) + 9 * caam_ptr_sz)
#endif
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